Laser heating setup for diamond anvil cells for in situ synchrotron and in house high and ultra-high pressure studies
Laser heating setup for diamond anvil cells for in situ synchrotron and in house high and ultra-high pressure studies
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DOI：
10.1063/1.5117786
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发表时间：
2019-10-01
影响因子：
1.6
通讯作者：
Dubrovinskaia, N.
中科院分区：
文献类型：
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作者：
Fedotenko, T.;Dubrovinsky, L.;Dubrovinskaia, N.
金刚石砧细胞（DAC）技术与激光加热相结合是研究高压高温条件下材料的主要方法之一。在这项工作中，我们提出了一种可转移的双面激光加热装置，用于原位温度测定。该装置允许在超过200gpa的压力下在DAC内精确加热样品，并可与同步加速器光束线设备相结合。它可以应用于x射线衍射和x射线透射显微镜实验。在设置中，我们使用高倍率和低工作距离的无限远校正激光聚焦物镜，使我们能够将激光束的尺寸减小到小于5 μ m，并实现320倍的最大光学放大倍率。为了在570- 830nm光谱范围内精确测定原位温度，该装置的所有光学元件都被选择以最小化色差和空间像差。灵活的设计，我们的设置允许简单的交换激光源和聚焦光学应用于不同类型的研究。该装置在室内和欧洲同步辐射设施的高压衍射光束线ID15B上成功地进行了测试。我们展示了一个应用于PdH高压高温粉末衍射研究和铂在22(1)GPa下的x射线透射显微镜作为DACs熔化检测的新方法的例子。由AIP出版社授权出版。
The diamond anvil cell (DAC) technique combined with laser heating is one of the major methods for studying materials at high pressure and high temperature conditions. In this work, we present a transferable double-sided laser heating setup for DACs with in situ temperature determination. The setup allows precise heating of samples inside a DAC at pressures above 200 GPa and could be combined with synchrotron beamline equipment. It can be applied to X-ray diffraction and X-ray transmission microscopy experiments. In the setup, we use high-magnification and low working distance infinity corrected laser focusing objectives that enable us to decrease the size of the laser beam to less than 5 mu m and achieve the maximum optical magnification of 320 times. All optical components of the setup were chosen to minimize chromatic and spatial aberrations for accurate in situ temperature determination by multiwavelength spectroscopy in the 570-830 nm spectral range. Flexible design of our setup allows simple interchange of laser sources and focusing optics for application in different types of studies. The setup was successfully tested in house and at the high-pressure diffraction beamline ID15B at the European Synchrotron Radiation Facility. We demonstrate an example of application of the setup for the high pressure-high temperature powder diffraction study of PdH and X-ray transmission microscopy of platinum at 22(1) GPa as a novel method of melting detection in DACs. Published under license by AIP Publishing.